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1 // symtab.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #if defined (__GNUG__) |
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29 #pragma implementation |
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30 #endif |
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31 |
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32 #include "symtab.h" |
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33 #include "error.h" |
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34 #include "variables.h" |
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35 #include "utils.h" |
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36 #include "tree-base.h" |
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37 #include "tree-expr.h" |
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38 #include "tree-const.h" |
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39 |
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40 extern "C" |
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41 { |
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42 #include "fnmatch.h" |
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43 } |
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44 |
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45 // Variables and functions. |
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46 |
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47 symbol_def::symbol_def (void) |
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48 { |
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195
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49 init_state (); |
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50 } |
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51 |
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52 symbol_def::symbol_def (tree_constant *t) |
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53 { |
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54 init_state (); |
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55 definition = t; |
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56 type = USER_VARIABLE; |
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57 } |
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58 |
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59 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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60 { |
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61 init_state (); |
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62 definition = t; |
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63 type = BUILTIN_FUNCTION | fcn_type; |
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64 } |
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65 |
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66 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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67 { |
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68 init_state (); |
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69 definition = t; |
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70 type = USER_FUNCTION | fcn_type; |
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195
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71 } |
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72 |
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73 void |
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74 symbol_def::init_state (void) |
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75 { |
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76 type = UNKNOWN; |
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77 eternal = 0; |
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78 read_only = 0; |
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79 |
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80 help_string = 0; |
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81 definition = 0; |
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82 next_elem = 0; |
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83 count = 0; |
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84 } |
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85 |
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86 symbol_def::~symbol_def (void) |
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87 { |
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88 delete [] help_string; |
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89 delete definition; |
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90 } |
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91 |
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195
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92 int |
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93 symbol_def::is_variable (void) const |
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94 { |
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95 return (type & USER_VARIABLE || type & BUILTIN_VARIABLE); |
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195
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96 } |
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97 |
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98 int |
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99 symbol_def::is_function (void) const |
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100 { |
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101 return (type & USER_FUNCTION || type & BUILTIN_FUNCTION); |
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195
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102 } |
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103 |
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104 int |
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105 symbol_def::is_user_variable (void) const |
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106 { |
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107 return (type & USER_VARIABLE); |
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108 } |
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109 |
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110 int |
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111 symbol_def::is_text_function (void) const |
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112 { |
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113 return (type & TEXT_FUNCTION); |
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114 } |
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115 |
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116 int |
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117 symbol_def::is_mapper_function (void) const |
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118 { |
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119 return (type & MAPPER_FUNCTION); |
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195
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120 } |
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121 |
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122 int |
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123 symbol_def::is_user_function (void) const |
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124 { |
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125 return (type & USER_FUNCTION); |
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195
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126 } |
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127 |
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128 int |
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129 symbol_def::is_builtin_variable (void) const |
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130 { |
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131 return (type & BUILTIN_VARIABLE); |
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195
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132 } |
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133 |
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134 int |
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135 symbol_def::is_builtin_function (void) const |
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136 { |
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137 return (type & BUILTIN_FUNCTION); |
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195
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138 } |
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139 |
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140 void |
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141 symbol_def::define (tree_constant *t) |
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142 { |
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143 definition = t; |
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195
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144 if (! is_builtin_variable ()) |
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145 type = USER_VARIABLE; |
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146 } |
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147 |
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148 void |
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149 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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150 { |
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151 definition = t; |
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152 type = BUILTIN_FUNCTION | fcn_type; |
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153 } |
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154 |
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155 void |
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156 symbol_def::define (tree_function *t, unsigned fcn_type) |
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157 { |
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158 definition = t; |
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159 type = USER_FUNCTION | fcn_type; |
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195
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160 } |
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161 |
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162 void |
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163 symbol_def::protect (void) |
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164 { |
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165 read_only = 1; |
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166 } |
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167 |
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168 void |
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169 symbol_def::unprotect (void) |
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170 { |
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171 read_only = 0; |
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172 |
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173 } |
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174 |
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175 void |
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176 symbol_def::make_eternal (void) |
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177 { |
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178 eternal = 1; |
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179 } |
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180 |
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181 tree_fvc * |
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182 symbol_def::def (void) const |
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183 { |
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184 return definition; |
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185 } |
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186 |
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187 char * |
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188 symbol_def::help (void) const |
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189 { |
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190 return help_string; |
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191 } |
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192 |
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193 void |
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194 symbol_def::document (const char *h) |
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195 { |
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196 delete [] help_string; |
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197 help_string = strsave (h); |
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198 } |
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199 |
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200 int |
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195
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201 maybe_delete (symbol_def *def) |
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202 { |
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203 int count = 0; |
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204 if (def && def->count > 0) |
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195
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205 { |
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206 def->count--; |
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207 count = def->count; |
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208 if (def->count == 0) |
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209 delete def; |
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195
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210 } |
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211 return count; |
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212 } |
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213 |
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214 // Individual records in a symbol table. |
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215 |
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216 symbol_record::symbol_record (void) |
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217 { |
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195
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218 init_state (); |
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219 } |
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220 |
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221 symbol_record::symbol_record (const char *n, symbol_record *nxt) |
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222 { |
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223 init_state (); |
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224 nm = strsave (n); |
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225 next_elem = nxt; |
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226 } |
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227 |
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195
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228 void |
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229 symbol_record::init_state (void) |
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230 { |
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231 formal_param = 0; |
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232 linked_to_global = 0; |
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233 nm = 0; |
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234 sv_fcn = 0; |
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235 definition = 0; |
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236 next_elem = 0; |
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237 } |
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238 |
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239 symbol_record::~symbol_record (void) |
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240 { |
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241 delete [] nm; |
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242 } |
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243 |
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244 char * |
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245 symbol_record::name (void) const |
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246 { |
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247 return nm; |
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248 } |
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249 |
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250 char * |
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251 symbol_record::help (void) const |
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252 { |
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253 return definition ? definition->help () : 0; |
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254 } |
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255 |
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256 tree_fvc * |
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257 symbol_record::def (void) const |
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258 { |
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259 return definition ? definition->def () : 0; |
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260 } |
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261 |
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572
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262 void |
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263 symbol_record::rename (const char *new_name) |
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264 { |
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265 delete [] nm; |
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266 nm = strsave (new_name); |
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267 } |
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268 |
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269 int |
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270 symbol_record::is_function (void) const |
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271 { |
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272 return definition ? definition->is_function () : 0; |
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273 } |
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274 |
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275 int |
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276 symbol_record::is_text_function (void) const |
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277 { |
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278 return definition ? definition->is_text_function () : 0; |
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279 } |
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280 |
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281 int |
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282 symbol_record::is_mapper_function (void) const |
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283 { |
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284 return definition ? definition->is_mapper_function () : 0; |
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285 } |
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286 |
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287 int |
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288 symbol_record::is_user_function (void) const |
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289 { |
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290 return definition ? definition->is_user_function () : 0; |
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291 } |
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292 |
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293 int |
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294 symbol_record::is_builtin_function (void) const |
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295 { |
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296 return definition ? definition->is_builtin_function () : 0; |
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297 } |
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298 |
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299 int |
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300 symbol_record::is_variable (void) const |
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301 { |
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302 return definition ? definition->is_variable () : 0; |
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303 } |
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304 |
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305 int |
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306 symbol_record::is_user_variable (void) const |
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307 { |
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308 return definition ? definition->is_user_variable () : 0; |
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309 } |
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310 |
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311 int |
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312 symbol_record::is_builtin_variable (void) const |
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313 { |
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314 return definition ? definition->is_builtin_variable () : 0; |
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315 } |
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316 |
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317 unsigned |
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318 symbol_record::type (void) const |
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319 { |
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320 return definition ? definition->type : 0; |
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321 } |
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322 |
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323 int |
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164
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324 symbol_record::is_defined (void) const |
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325 { |
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326 return definition ? (definition->def () != 0) : 0; |
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327 } |
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328 |
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329 int |
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330 symbol_record::is_read_only (void) const |
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331 { |
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332 return definition ? definition->read_only : 0; |
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333 } |
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334 |
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335 int |
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336 symbol_record::is_eternal (void) const |
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337 { |
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338 return definition ? definition->eternal : 0; |
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339 } |
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340 |
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341 void |
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342 symbol_record::protect (void) |
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343 { |
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344 if (definition) |
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345 { |
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346 definition->protect (); |
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347 |
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348 if (! is_defined ()) |
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349 warning ("protecting undefined variable `%s'", nm); |
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350 } |
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351 } |
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352 |
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353 void |
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354 symbol_record::unprotect (void) |
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355 { |
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356 if (definition) |
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357 definition->unprotect (); |
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358 } |
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359 |
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360 void |
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361 symbol_record::make_eternal (void) |
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362 { |
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363 if (definition) |
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364 { |
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365 definition->make_eternal (); |
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366 |
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367 if (! is_defined ()) |
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368 warning ("giving eternal life to undefined variable `%s'", nm); |
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369 } |
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370 } |
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371 |
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372 void |
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373 symbol_record::set_sv_function (sv_Function f) |
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374 { |
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375 sv_fcn = f; |
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376 } |
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377 |
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378 int |
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379 symbol_record::define (tree_constant *t) |
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380 { |
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381 if (is_variable () && read_only_error ()) |
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382 return 0; |
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383 |
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384 tree_fvc *saved_def = 0; |
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385 if (! definition) |
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195
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386 { |
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387 definition = new symbol_def (); |
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388 definition->count = 1; |
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389 } |
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390 else if (is_function ()) |
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391 { |
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195
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392 symbol_def *new_def = new symbol_def (); |
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393 push_def (new_def); |
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394 definition->count = 1; |
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395 } |
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195
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396 else if (is_variable ()) |
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397 { |
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195
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398 saved_def = definition->def (); |
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399 } |
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400 |
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195
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401 definition->define (t); |
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402 |
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403 if (sv_fcn && sv_fcn () < 0) |
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404 { |
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195
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405 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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406 definition->define ((tree_constant *) saved_def); |
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407 delete t; |
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408 return 0; |
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409 } |
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410 |
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411 delete saved_def; |
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412 |
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413 return 1; |
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414 } |
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415 |
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416 int |
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417 symbol_record::define (tree_builtin *t, int text_fcn) |
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418 { |
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195
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419 if (read_only_error ()) |
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420 return 0; |
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421 |
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195
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422 if (is_variable ()) |
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423 { |
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195
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424 symbol_def *old_def = pop_def (); |
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425 maybe_delete (old_def); |
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1
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426 } |
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427 |
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195
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428 if (is_function ()) |
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429 { |
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195
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430 symbol_def *old_def = pop_def (); |
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431 maybe_delete (old_def); |
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432 } |
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433 |
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434 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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435 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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436 : symbol_def::UNKNOWN); |
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437 |
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438 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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439 push_def (new_def); |
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440 definition->count = 1; |
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441 |
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442 return 1; |
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443 } |
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444 |
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445 int |
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530
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446 symbol_record::define (tree_function *t, int text_fcn) |
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447 { |
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195
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448 if (read_only_error ()) |
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449 return 0; |
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450 |
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195
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451 if (is_variable ()) |
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452 { |
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195
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453 symbol_def *old_def = pop_def (); |
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454 maybe_delete (old_def); |
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1
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455 } |
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456 |
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195
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457 if (is_function ()) |
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1
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458 { |
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195
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459 symbol_def *old_def = pop_def (); |
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460 maybe_delete (old_def); |
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1
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461 } |
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462 |
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530
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463 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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464 : symbol_def::UNKNOWN; |
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465 |
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466 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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467 push_def (new_def); |
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468 definition->count = 1; |
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469 |
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470 return 1; |
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471 } |
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472 |
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473 int |
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474 symbol_record::define_as_fcn (tree_constant *t) |
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475 { |
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195
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476 if (is_variable () && read_only_error ()) |
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1
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477 return 0; |
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478 |
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195
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479 if (is_variable ()) |
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1
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480 { |
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195
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481 symbol_def *old_def = pop_def (); |
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482 maybe_delete (old_def); |
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483 } |
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484 |
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485 if (is_function ()) |
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486 { |
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487 symbol_def *old_def = pop_def (); |
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488 maybe_delete (old_def); |
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1
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489 } |
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490 |
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195
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491 symbol_def *new_def = new symbol_def (t); |
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492 push_def (new_def); |
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493 definition->count = 1; |
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494 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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495 |
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496 return 1; |
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497 } |
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498 |
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195
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499 int |
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500 symbol_record::define_builtin_var (tree_constant *t) |
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501 { |
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502 define (t); |
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503 if (is_variable ()) |
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504 definition->type = symbol_def::BUILTIN_VARIABLE; |
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530
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505 return 1; |
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195
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506 } |
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507 |
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1
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508 void |
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164
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509 symbol_record::document (const char *h) |
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1
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510 { |
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530
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511 if (definition) |
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195
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512 { |
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513 definition->document (h); |
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1
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514 |
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195
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515 if (! is_defined ()) |
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|
516 warning ("documenting undefined variable `%s'", nm); |
|
|
517 } |
|
1
|
518 } |
|
|
519 |
|
|
520 int |
|
195
|
521 symbol_record::clear (void) |
|
1
|
522 { |
|
195
|
523 int count = 0; |
|
|
524 if (linked_to_global) |
|
1
|
525 { |
|
195
|
526 count = maybe_delete (definition); |
|
530
|
527 definition = 0; |
|
195
|
528 linked_to_global = 0; |
|
1
|
529 } |
|
195
|
530 else |
|
|
531 { |
|
|
532 symbol_def *old_def = pop_def (); |
|
|
533 count = maybe_delete (old_def); |
|
|
534 } |
|
|
535 return count; |
|
1
|
536 } |
|
|
537 |
|
|
538 void |
|
530
|
539 symbol_record::alias (symbol_record *s, int force) |
|
1
|
540 { |
|
195
|
541 sv_fcn = s->sv_fcn; |
|
|
542 |
|
530
|
543 if (force && ! s->definition) |
|
1
|
544 { |
|
195
|
545 s->definition = new symbol_def (); |
|
|
546 definition = s->definition; |
|
|
547 definition->count = 2; // Yes, this is correct. |
|
1
|
548 } |
|
530
|
549 else if (s->definition) |
|
1
|
550 { |
|
195
|
551 definition = s->definition; |
|
|
552 definition->count++; |
|
1
|
553 } |
|
|
554 } |
|
|
555 |
|
|
556 void |
|
|
557 symbol_record::mark_as_formal_parameter (void) |
|
|
558 { |
|
|
559 formal_param = 1; |
|
|
560 } |
|
|
561 |
|
|
562 int |
|
164
|
563 symbol_record::is_formal_parameter (void) const |
|
1
|
564 { |
|
|
565 return formal_param; |
|
|
566 } |
|
|
567 |
|
|
568 void |
|
195
|
569 symbol_record::mark_as_linked_to_global (void) |
|
122
|
570 { |
|
195
|
571 linked_to_global = 1; |
|
122
|
572 } |
|
|
573 |
|
|
574 int |
|
195
|
575 symbol_record::is_linked_to_global (void) const |
|
1
|
576 { |
|
195
|
577 return linked_to_global; |
|
1
|
578 } |
|
|
579 |
|
|
580 symbol_record * |
|
164
|
581 symbol_record::next (void) const |
|
1
|
582 { |
|
|
583 return next_elem; |
|
|
584 } |
|
|
585 |
|
195
|
586 void |
|
|
587 symbol_record::chain (symbol_record *s) |
|
|
588 { |
|
|
589 next_elem = s; |
|
|
590 } |
|
|
591 |
|
220
|
592 void |
|
|
593 symbol_record::push_context (void) |
|
|
594 { |
|
|
595 context.push (definition); |
|
530
|
596 definition = 0; |
|
395
|
597 |
|
|
598 global_link_context.push ((unsigned) linked_to_global); |
|
|
599 linked_to_global = 0; |
|
220
|
600 } |
|
|
601 |
|
|
602 void |
|
|
603 symbol_record::pop_context (void) |
|
|
604 { |
|
|
605 assert (! context.empty ()); |
|
|
606 |
|
|
607 if (is_variable ()) |
|
|
608 { |
|
|
609 symbol_def *old_def = pop_def (); |
|
|
610 maybe_delete (old_def); |
|
|
611 } |
|
|
612 |
|
|
613 if (is_function ()) |
|
|
614 { |
|
|
615 symbol_def *old_def = pop_def (); |
|
|
616 maybe_delete (old_def); |
|
|
617 } |
|
|
618 |
|
|
619 definition = context.pop (); |
|
395
|
620 linked_to_global = global_link_context.pop (); |
|
220
|
621 } |
|
|
622 |
|
195
|
623 int |
|
|
624 symbol_record::read_only_error (void) |
|
|
625 { |
|
|
626 if (is_read_only ()) |
|
|
627 { |
|
|
628 char *tag = "symbol"; |
|
|
629 if (is_variable ()) |
|
|
630 tag = "variable"; |
|
|
631 else if (is_function ()) |
|
|
632 tag = "function"; |
|
|
633 |
|
696
|
634 ::error ("can't redefine read-only %s `%s'", tag, nm); |
|
195
|
635 |
|
|
636 return 1; |
|
|
637 } |
|
|
638 else |
|
|
639 return 0; |
|
|
640 } |
|
|
641 |
|
|
642 void |
|
|
643 symbol_record::push_def (symbol_def *sd) |
|
|
644 { |
|
530
|
645 if (! sd) |
|
195
|
646 return; |
|
|
647 |
|
|
648 sd->next_elem = definition; |
|
|
649 definition = sd; |
|
|
650 } |
|
|
651 |
|
|
652 symbol_def * |
|
|
653 symbol_record::pop_def (void) |
|
|
654 { |
|
|
655 symbol_def *top = definition; |
|
530
|
656 if (definition) |
|
195
|
657 definition = definition->next_elem; |
|
|
658 return top; |
|
|
659 } |
|
|
660 |
|
767
|
661 // A structure for handling verbose information about a symbol_record. |
|
195
|
662 |
|
|
663 symbol_record_info::symbol_record_info (void) |
|
|
664 { |
|
|
665 init_state (); |
|
|
666 } |
|
|
667 |
|
|
668 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
669 { |
|
|
670 init_state (); |
|
|
671 |
|
|
672 type = sr.type (); |
|
|
673 |
|
|
674 if (sr.is_variable () && sr.is_defined ()) |
|
|
675 { |
|
|
676 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
677 tree_constant *tmp = (tree_constant *) sr.def (); |
|
620
|
678 if (tmp->is_real_scalar ()) |
|
|
679 const_type = SR_INFO_SCALAR; |
|
|
680 else if (tmp->is_complex_scalar ()) |
|
|
681 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
682 else if (tmp->is_real_matrix ()) |
|
|
683 const_type = SR_INFO_MATRIX; |
|
|
684 else if (tmp->is_complex_matrix ()) |
|
|
685 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
686 else if (tmp->is_range ()) |
|
|
687 const_type = SR_INFO_RANGE; |
|
|
688 else if (tmp->is_string ()) |
|
|
689 const_type = SR_INFO_STRING; |
|
195
|
690 |
|
|
691 nr = tmp->rows (); |
|
|
692 nc = tmp->columns (); |
|
|
693 |
|
|
694 symbol_def *sr_def = sr.definition; |
|
|
695 symbol_def *hidden_def = sr_def->next_elem; |
|
530
|
696 if (hidden_def) |
|
195
|
697 { |
|
|
698 if (hidden_def->is_user_function ()) |
|
|
699 hides = SR_INFO_USER_FUNCTION; |
|
|
700 else if (hidden_def->is_builtin_function ()) |
|
|
701 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
702 } |
|
|
703 } |
|
|
704 |
|
|
705 eternal = sr.is_eternal (); |
|
|
706 read_only = sr.is_read_only (); |
|
|
707 |
|
|
708 nm = strsave (sr.name ()); |
|
|
709 |
|
|
710 initialized = 1; |
|
|
711 } |
|
|
712 |
|
|
713 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
714 { |
|
|
715 type = s.type; |
|
|
716 const_type = s.const_type; |
|
|
717 hides = s.hides; |
|
|
718 eternal = s.eternal; |
|
|
719 read_only = s.read_only; |
|
|
720 nr = s.nr; |
|
|
721 nc = s.nc; |
|
|
722 nm = strsave (s.nm); |
|
|
723 initialized = s.initialized; |
|
|
724 } |
|
|
725 |
|
|
726 symbol_record_info::~symbol_record_info (void) |
|
|
727 { |
|
|
728 delete nm; |
|
|
729 } |
|
|
730 |
|
|
731 symbol_record_info& |
|
|
732 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
733 { |
|
|
734 if (this != &s) |
|
|
735 { |
|
|
736 delete nm; |
|
|
737 type = s.type; |
|
|
738 const_type = s.const_type; |
|
|
739 hides = s.hides; |
|
|
740 eternal = s.eternal; |
|
|
741 read_only = s.read_only; |
|
|
742 nr = s.nr; |
|
|
743 nc = s.nc; |
|
|
744 nm = strsave (s.nm); |
|
|
745 initialized = s.initialized; |
|
|
746 } |
|
|
747 return *this; |
|
|
748 } |
|
|
749 |
|
|
750 int |
|
|
751 symbol_record_info::is_defined (void) const |
|
|
752 { |
|
|
753 return initialized; |
|
|
754 } |
|
|
755 |
|
|
756 int |
|
|
757 symbol_record_info::is_read_only (void) const |
|
|
758 { |
|
|
759 return read_only; |
|
|
760 } |
|
|
761 |
|
|
762 int |
|
|
763 symbol_record_info::is_eternal (void) const |
|
|
764 { |
|
|
765 return eternal; |
|
|
766 } |
|
|
767 |
|
|
768 int |
|
|
769 symbol_record_info::hides_fcn (void) const |
|
|
770 { |
|
|
771 return (hides & SR_INFO_USER_FUNCTION); |
|
|
772 } |
|
|
773 |
|
|
774 int |
|
|
775 symbol_record_info::hides_builtin (void) const |
|
|
776 { |
|
|
777 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
778 } |
|
|
779 |
|
|
780 char * |
|
|
781 symbol_record_info::type_as_string (void) const |
|
|
782 { |
|
|
783 if (type == symbol_def::USER_FUNCTION) |
|
|
784 return "user function"; |
|
|
785 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
786 return "builtin function"; |
|
|
787 else |
|
|
788 { |
|
|
789 if (const_type == SR_INFO_SCALAR) |
|
|
790 return "real scalar"; |
|
|
791 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
792 return "complex scalar"; |
|
|
793 else if (const_type == SR_INFO_MATRIX) |
|
|
794 return "real matrix"; |
|
|
795 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
796 return "complex matrix"; |
|
|
797 else if (const_type == SR_INFO_RANGE) |
|
|
798 return "range"; |
|
|
799 else if (const_type == SR_INFO_STRING) |
|
|
800 return "string"; |
|
|
801 else |
|
|
802 return ""; |
|
|
803 } |
|
|
804 } |
|
|
805 |
|
|
806 int |
|
|
807 symbol_record_info::is_function (void) const |
|
|
808 { |
|
|
809 return (type == symbol_def::USER_FUNCTION |
|
|
810 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
811 } |
|
|
812 |
|
|
813 int |
|
|
814 symbol_record_info::rows (void) const |
|
|
815 { |
|
|
816 return nr; |
|
|
817 } |
|
|
818 |
|
|
819 int |
|
|
820 symbol_record_info::columns (void) const |
|
|
821 { |
|
|
822 return nc; |
|
|
823 } |
|
|
824 |
|
|
825 char * |
|
|
826 symbol_record_info::name (void) const |
|
|
827 { |
|
|
828 return nm; |
|
|
829 } |
|
|
830 |
|
|
831 void |
|
|
832 symbol_record_info::init_state (void) |
|
|
833 { |
|
|
834 initialized = 0; |
|
|
835 type = symbol_def::UNKNOWN; |
|
|
836 const_type = SR_INFO_UNKNOWN; |
|
|
837 hides = SR_INFO_NONE; |
|
|
838 eternal = 0; |
|
|
839 read_only = 0; |
|
|
840 nr = -1; |
|
|
841 nc = -1; |
|
530
|
842 nm = 0; |
|
195
|
843 } |
|
|
844 |
|
767
|
845 // A symbol table. |
|
1
|
846 |
|
|
847 symbol_table::symbol_table (void) |
|
|
848 { |
|
|
849 } |
|
|
850 |
|
|
851 symbol_record * |
|
530
|
852 symbol_table::lookup (const char *nm, int insert, int warn) |
|
1
|
853 { |
|
|
854 int index = hash (nm) & HASH_MASK; |
|
|
855 |
|
|
856 symbol_record *ptr = table[index].next (); |
|
|
857 |
|
530
|
858 while (ptr) |
|
1
|
859 { |
|
|
860 if (strcmp (ptr->name (), nm) == 0) |
|
|
861 return ptr; |
|
|
862 ptr = ptr->next (); |
|
|
863 } |
|
|
864 |
|
|
865 if (insert) |
|
|
866 { |
|
|
867 symbol_record *new_sym; |
|
|
868 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
869 table[index].chain (new_sym); |
|
1
|
870 return new_sym; |
|
|
871 } |
|
|
872 else if (warn) |
|
217
|
873 warning ("lookup: symbol`%s' not found", nm); |
|
1
|
874 |
|
530
|
875 return 0; |
|
1
|
876 } |
|
|
877 |
|
|
878 void |
|
572
|
879 symbol_table::rename (const char *old_name, const char *new_name) |
|
|
880 { |
|
|
881 int index = hash (old_name) & HASH_MASK; |
|
|
882 |
|
|
883 symbol_record *prev = &table[index]; |
|
|
884 symbol_record *ptr = prev->next (); |
|
|
885 |
|
|
886 while (ptr) |
|
|
887 { |
|
|
888 if (strcmp (ptr->name (), old_name) == 0) |
|
|
889 { |
|
|
890 prev->chain (ptr->next ()); |
|
|
891 |
|
|
892 index = hash (new_name) & HASH_MASK; |
|
|
893 table[index].chain (ptr); |
|
|
894 ptr->rename (new_name); |
|
|
895 |
|
|
896 return; |
|
|
897 } |
|
|
898 |
|
|
899 prev = ptr; |
|
|
900 ptr = ptr->next (); |
|
|
901 } |
|
|
902 |
|
|
903 panic_impossible (); |
|
|
904 } |
|
|
905 |
|
|
906 void |
|
530
|
907 symbol_table::clear (int clear_user_functions) |
|
1
|
908 { |
|
|
909 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
910 { |
|
169
|
911 symbol_record *ptr = table[i].next (); |
|
1
|
912 |
|
530
|
913 while (ptr) |
|
169
|
914 { |
|
195
|
915 if (ptr->is_user_variable () |
|
|
916 || (clear_user_functions && ptr->is_user_function ())) |
|
|
917 { |
|
|
918 ptr->clear (); |
|
|
919 } |
|
|
920 |
|
169
|
921 ptr = ptr->next (); |
|
1
|
922 } |
|
|
923 } |
|
|
924 } |
|
|
925 |
|
|
926 int |
|
530
|
927 symbol_table::clear (const char *nm, int clear_user_functions) |
|
1
|
928 { |
|
|
929 int index = hash (nm) & HASH_MASK; |
|
|
930 |
|
195
|
931 symbol_record *ptr = table[index].next (); |
|
1
|
932 |
|
530
|
933 while (ptr) |
|
1
|
934 { |
|
195
|
935 if (strcmp (ptr->name (), nm) == 0 |
|
|
936 && (ptr->is_user_variable () |
|
|
937 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
938 { |
|
195
|
939 ptr->clear (); |
|
|
940 return 1; |
|
1
|
941 } |
|
195
|
942 ptr = ptr->next (); |
|
1
|
943 } |
|
|
944 |
|
|
945 return 0; |
|
|
946 } |
|
|
947 |
|
|
948 int |
|
164
|
949 symbol_table::size (void) const |
|
1
|
950 { |
|
|
951 int count = 0; |
|
|
952 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
953 { |
|
|
954 symbol_record *ptr = table[i].next (); |
|
530
|
955 while (ptr) |
|
1
|
956 { |
|
|
957 count++; |
|
|
958 ptr = ptr->next (); |
|
|
959 } |
|
|
960 } |
|
|
961 return count; |
|
|
962 } |
|
|
963 |
|
195
|
964 static inline int |
|
|
965 pstrcmp (char **a, char **b) |
|
1
|
966 { |
|
195
|
967 return strcmp (*a, *b); |
|
1
|
968 } |
|
|
969 |
|
195
|
970 static inline int |
|
|
971 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
972 { |
|
195
|
973 return strcmp (a->name (), b->name ()); |
|
1
|
974 } |
|
|
975 |
|
195
|
976 // This function should probably share code with symbol_table::list. |
|
|
977 // XXX FIXME XXX |
|
1
|
978 |
|
195
|
979 symbol_record_info * |
|
530
|
980 symbol_table::long_list (int& count, int sort, unsigned type, |
|
|
981 unsigned scope) const |
|
1
|
982 { |
|
115
|
983 count = 0; |
|
1
|
984 int n = size (); |
|
|
985 if (n == 0) |
|
530
|
986 return 0; |
|
1
|
987 |
|
195
|
988 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
989 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
990 { |
|
|
991 symbol_record *ptr = table[i].next (); |
|
530
|
992 while (ptr) |
|
1
|
993 { |
|
|
994 assert (count < n); |
|
195
|
995 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
996 unsigned my_type = ptr->type (); |
|
|
997 if ((type & my_type) && (scope & my_scope)) |
|
|
998 { |
|
|
999 symbols[count++] = symbol_record_info (*ptr); |
|
|
1000 } |
|
1
|
1001 ptr = ptr->next (); |
|
|
1002 } |
|
|
1003 } |
|
195
|
1004 symbols[count] = symbol_record_info (); |
|
|
1005 |
|
530
|
1006 if (sort && symbols) |
|
195
|
1007 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1008 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1009 |
|
1
|
1010 return symbols; |
|
|
1011 } |
|
|
1012 |
|
|
1013 char ** |
|
530
|
1014 symbol_table::list (int& count, int sort, unsigned type, |
|
|
1015 unsigned scope) const |
|
1
|
1016 { |
|
115
|
1017 count = 0; |
|
1
|
1018 int n = size (); |
|
|
1019 if (n == 0) |
|
530
|
1020 return 0; |
|
1
|
1021 |
|
|
1022 char **symbols = new char * [n+1]; |
|
|
1023 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1024 { |
|
|
1025 symbol_record *ptr = table[i].next (); |
|
530
|
1026 while (ptr) |
|
1
|
1027 { |
|
|
1028 assert (count < n); |
|
605
|
1029 |
|
195
|
1030 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1031 |
|
195
|
1032 unsigned my_type = ptr->type (); |
|
605
|
1033 |
|
195
|
1034 if ((type & my_type) && (scope & my_scope)) |
|
1
|
1035 symbols[count++] = strsave (ptr->name ()); |
|
605
|
1036 |
|
1
|
1037 ptr = ptr->next (); |
|
|
1038 } |
|
|
1039 } |
|
530
|
1040 symbols[count] = 0; |
|
1
|
1041 |
|
530
|
1042 if (sort && symbols) |
|
1
|
1043 qsort ((void **) symbols, count, sizeof (char *), |
|
530
|
1044 (int (*)(const void*, const void*)) pstrcmp); |
|
1
|
1045 |
|
|
1046 return symbols; |
|
|
1047 } |
|
|
1048 |
|
605
|
1049 symbol_record ** |
|
|
1050 symbol_table::glob (int& count, char *pat, unsigned type, |
|
|
1051 unsigned scope) const |
|
|
1052 { |
|
|
1053 count = 0; |
|
|
1054 int n = size (); |
|
|
1055 if (n == 0) |
|
|
1056 return 0; |
|
|
1057 |
|
|
1058 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1059 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1060 { |
|
|
1061 symbol_record *ptr = table[i].next (); |
|
|
1062 while (ptr) |
|
|
1063 { |
|
|
1064 assert (count < n); |
|
|
1065 |
|
|
1066 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1067 |
|
|
1068 unsigned my_type = ptr->type (); |
|
|
1069 |
|
|
1070 if ((type & my_type) && (scope & my_scope) |
|
|
1071 && fnmatch (pat, ptr->name (), __FNM_FLAGS) == 0) |
|
|
1072 { |
|
|
1073 symbols[count++] = ptr; |
|
|
1074 } |
|
|
1075 |
|
|
1076 ptr = ptr->next (); |
|
|
1077 } |
|
|
1078 } |
|
|
1079 symbols[count] = 0; |
|
|
1080 |
|
|
1081 return symbols; |
|
|
1082 } |
|
|
1083 |
|
220
|
1084 void |
|
|
1085 symbol_table::push_context (void) |
|
|
1086 { |
|
|
1087 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1088 { |
|
|
1089 symbol_record *ptr = table[i].next (); |
|
|
1090 |
|
530
|
1091 while (ptr) |
|
220
|
1092 { |
|
|
1093 ptr->push_context (); |
|
|
1094 ptr = ptr->next (); |
|
|
1095 } |
|
|
1096 } |
|
|
1097 } |
|
|
1098 |
|
|
1099 void |
|
|
1100 symbol_table::pop_context (void) |
|
|
1101 { |
|
|
1102 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1103 { |
|
|
1104 symbol_record *ptr = table[i].next (); |
|
|
1105 |
|
530
|
1106 while (ptr) |
|
220
|
1107 { |
|
|
1108 ptr->pop_context (); |
|
|
1109 ptr = ptr->next (); |
|
|
1110 } |
|
|
1111 } |
|
|
1112 } |
|
|
1113 |
|
1
|
1114 // Chris Torek's fave hash function. |
|
|
1115 |
|
|
1116 unsigned int |
|
|
1117 symbol_table::hash (const char *str) |
|
|
1118 { |
|
|
1119 unsigned h = 0; |
|
|
1120 while (*str) |
|
|
1121 h = h * 33 + *str++; |
|
|
1122 return h; |
|
|
1123 } |
|
|
1124 |
|
|
1125 /* |
|
|
1126 ;;; Local Variables: *** |
|
|
1127 ;;; mode: C++ *** |
|
|
1128 ;;; page-delimiter: "^/\\*" *** |
|
|
1129 ;;; End: *** |
|
|
1130 */ |
